Saw-tensioning tool



Sept. 23,1930. w, ERN R 1,776,463

SAW TENS IONING TOOL Filed Sept. 24, 1928 I N VEN TOR.

A TTORNEY.

Y @a support'shown in section,

a l Patented Sept. 23.1930

* q FLOYD WJBERNERO, F MEMPHIs rEuNEssnn i f ,sAw-mENsIouING root I .a n aus l filed s ptemberai, 122s. Seria1 No.308,099.

My invention relatesto'a saw stretching or tens oning deviceand it is an. ob ect of the same to; provide a highly efficient device I of the character"described; such as can be i 5 used in mills without'dismounting the saws.

Saws'ot the gintype arelargely used in cotton seed oil mills for delinting the cotton "seed; These saws are mounted'in sets or gangs consisting of a coaxialseries of saws ona shaft or mandrel and'that revolve at high speed hence must be securely fastened :to-the mandrel, while the friction due to the hard surface of the seed causes the outer pej riphe'ry of the saw to expand and stretch in 7 well known manner. Vfith my device the saws can be brought back to proper shape 'without dismounting them orfremoving them from the mill and it'is of course possible also tofset up the device in a shop and bring 2 saws or gangs of saws to the shop for treatment. v p Referring to the drawings, which are made a part of this application and in which simila'r reference characters indicate similar 1 parts: 1

I Fig. 1 is asideelevation ofmy device with v j Fig. 2, a plan, and 1 Fig. 3, a front end View.

'30 In the drawings reference character 10 'in-' dicates saws which may beassumed to be arranged ina coaxial seriesj-either in the mill or'elsewhere. A'holder extends along the front of the seriesot saws, saidholder'com- 3'5. prising a flat bar 14 supported on legs 11. A V 1 base- 12 has a hooked portion 13 adapted L to engage underth'e flat bar 14 andris provided with a movable abutment 15 in the form of a pin that c'an be pulled up to permit .the hook 13 to pass under the flat bar 14,

afterwhicha set screw 16 can be set up against the flatvbar 14to draw abutment 15 back against the holder and thus secure the "base rigidly in position opposite a saw tobe tens oned. A suPP 17 is pivotally mount;

ed on the'base adjacent therear end of the base as indicated at 181 As here shown two pins 18 serve to connect the support to the base and a screw 19 extending into the base is provided with a flat head 20 adapted to the saw. i

receive the end ofa wrench. A projection 36 V prevent it from rising.

pass through a slot at 21 in the support after which it may be turned as indicated inFig. 2

to lock the support down on the base. 'lwu shafts 22 and 23 are journaled on the support, in bearings 24 to 26, one set of bearings 24 and 24 being indicated as rigidly secured to the support, the bearing 25 for shaft 23 being pivoted at 26 and the bearing 27 floating on the support. A roller28is provided at the forward end of each shaft, these rollers coacting to stretch the. saw, The pivotal mounting of shaft 23 permits therollers to be separated in positioningthem for operation on the saw'or in removing them therefrom and a set screw 29 holds the pivoted shaft in adjusted position foroperationon Fordriving the device I. have provided means consisting of intermeshing gears 31 i and 32, on the respective shafts 22 and 23and a crank 33 mounted onshatt 22 by meansfof a sleeve 34 which is secured to the shaft by a set screw 35 having a hexagonal opening to extends-downward from the bearing 27 to 3 guide the same and a cotter pin'37 is in sertedthrough a hole in. the projection to Inthe operation of my device it is positioned on the bar 14 as abovestated and parts the rollers 28, 28in position adjacent a saw.

Thereafter the support is brought ClOWILtO the full line position of Fig. 1,the shafts 22 and 23 being appropriately located to bring 1 the rollers 28 into operative engagement with the saw. The screw 20 having been {(3. turned to lock the support down and the set screw16 having been set up to hold the base in placethe'crank 33 may now be rotated to drive the rollers, which will drive the saw and apply pressure to both sides thereof in a manner to obtain the desired result in an efficient and expeditious manner. Thereupon the set screw 16 and the screw 20 are again manipulated to permit thesupport to be moved toward the dotted line position and shafts. v

- gaging reduced threaded portions of the the base to be slid along the holder into open ative relation to another saw and so on;

The rollers 28 have a'ridge at the center at '38 and taper from this ridge towardeaeh end.

They are held onthe shafts by nuts 39 enn illi-be tenet-Ste those skilled in the an:

-thatvarious modifications may-be made in dioated in the appendedelaims.

.vention, What; olarmas new an 1 :seoure by Letters Patent, is

Q1. A Sa -Stret hing or tensioning' device my device Without. departing from the spirit" ofthe invention andItherefore'I do notglimitf -myself to what is shownin'the drawings or described in the speeilieation'but only as in-f said i'n- 7 Having thus iully desorib d d desire-to comprising base, a] support; tensioane means -1 nou1 1ted .on' and pro ect ng frorward from the :support, and a pivotal mounting forthesupport whereby the t'ensioningineans maybe'moved'out of the ivay of rotary saws arranged in aeoaxial series to permit relativeendvvise movement-between the and th t ns on n'g device. v

A sawrstr'etchnig' o1" tensioning device comprising a base, a p'airiof approximately parallel shafts means for driving the shafts simultaneously, rollers on the shafts for enga'gmg'opposite facesfof a saw, and a sup support being pivotally mounted on the base i V chil v \i c i n Y0 to even on an US extending 1 ansver el f said shafts whereby the support can be moved on its pivot'intov a position permittingrelaeve, longitudinalmovement of the streteliing 1 saW-stretehing device compris I base, a pa lrof approximately parallel shafts, means for driving the shafts s multaneously,

device and a series of coaxial rotary savvs. I

irollers on the'shafts for, engaging opposite faces of a saw, a support on which the shafts are ournaled sald support being plvotally; mounted on the base to sw ng onan' axis extending transversely of said; shafts-whereby the support can be moved on its pivot into a" 7 position 1 permitting relative longitudinal I I Y movement of the st'retchingdevice" and a, se-

ries of coaXi-al'rotary saws and means securinggthe support inoperative position,

I A saw stretching device eomprisin'ga base, a pair of approximately parallel shafts,

1 means for drivin'gth'e shaftssimultaneously,

rollers on the shafts for engaging'opposite faces of a saw, a support on which the shafts are journaled said support being pivotally aee the support and be turned toloclr the support in operative position. I a

5. A saw stretching device comprising base, ap'ai'r of approximately parallel shafts,

means fordrivihg the shafts simultaneously; rollers on the shafts for engagingopposite V faces ofasavv, asupport on 'vvhich the shafts are journaledl'sai-id support beingpiyotally mounted onthe base to swing on an axis extendingtransversely of said shafts whereby thesupportean be moved on its pivot into: a 1

position; permitting relative longitudinal movement of the stretching device and asei .2"FL -rERN RQ port on Which the shafts are ournaledsaid mounted on the baseto swing on anaxis, ex- V tending transversely of saidshafts whereby the support canbe moved on itstpivot into a a position: permitting relative longitudinal movement of the stretching device and a seingrfrom said base said screvvhaving a flattened head adaptedto pass through a slot in fries of vcoaxial rotary 'sawsyancl a screw ris- 

